722456 has 48 divisors (see below), whose sum is σ = 1675800. Its totient is φ = 290304.

The previous prime is 722431. The next prime is 722459. The reversal of 722456 is 654227.

It is a d-powerful number, because it can be written as 7² + 2¹⁶ + 4⁶ + 2¹⁸ + 5⁸ + 6 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722459) by changing a digit.

722456 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7400 + ... + 7496.

2⁷²²⁴⁵⁶ is an apocalyptic number.

722456 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (837900).

722456 is an abundant number, since it is smaller than the sum of its proper divisors (953344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722456 is a wasteful number, since it uses less digits than its factorization.

722456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 125 counting only the distinct ones).

The product of its digits is 3360, while the sum is 26.

The square root of 722456 is about 849.9741172530. The cubic root of 722456 is about 89.7298897378.

The spelling of 722456 in words is "seven hundred twenty-two thousand, four hundred fifty-six".